JP6969031B2 - Heat-not-burn tobacco - Google Patents

Description

The present invention relates to heat-not-burn tobacco.

It has a tobacco rod formed by filling the inside of a wrapping paper with a tobacco filler containing a tobacco raw material (for example, chopped tobacco, tobacco granules, a molded product of a tobacco sheet, etc.) and an aerosol-producing base material (glycerin, propylene glycol, etc.). Heat-not-burn tobacco is known (see, for example, Patent Document 1). This type of heat-not-burn tobacco is a type of tobacco article in which the tobacco filler is heated by an electric heater in a heating device without burning, and the aerosol produced in the tobacco filler is delivered to the user. As an electric heater, heaters having various shapes such as a blade shape and a rod shape have been put into practical use, and the tobacco rod is attached to the heating device by inserting the electric heater from the tip surface of the tobacco rod at the time of use.

Japanese Patent No. 5920744 Japanese Patent No. 5348648

Here, when the tobacco rod is inserted into the electric heater, a heater insertion cavity that opens on the tip surface side of the tobacco rod is formed in advance along the axial direction of the tobacco rod in order to reduce the insertion resistance of the electric heater. Think about it. However, since the tobacco filler constituting the tobacco rod is not a plastic body but an elastic body, simply drilling from the tip surface side of the tobacco rod closes the heater insertion cavity immediately after the drilling. Elastic deformation of the tobacco filler begins to occur in the direction, and for example, when the heated tobacco is stored for a long period of time, the cavity for inserting the heater of the tobacco rod may be blocked.

The present invention has been made in view of the above circumstances, and an object thereof is a heating type having a tobacco rod formed by filling the inside of a wrapping paper with a tobacco filler containing a tobacco raw material and an aerosol-forming substrate. It is an object of the present invention to provide a technique for suppressing the blockage of a heater insertion cavity opened on the tip end surface side of a tobacco rod during a storage period in tobacco.

The heat-not-burn tobacco according to the present invention for solving the above-mentioned problems is a heat-not-burn tobacco having a tobacco rod formed by filling the inside of a wrapping paper with a tobacco filler containing a tobacco raw material and an aerosol-producing substrate. A heater insertion cavity for inserting a heater of a heating device, which opens toward the tip end surface side of the tobacco rod and extends along the axial direction of the tobacco rod, and a heater insertion cavity in the tobacco rod. It is characterized by comprising a coating layer formed around the side of the cigarette and for suppressing the blockage of the heater insertion cavity.

Further, the coating layer may contain calcium carbonate or sodium silicate.

Further, the coating layer may contain a coating agent of 5 mg or more and 60 mg or less.

Further, the coating layer may be formed so as to cover a range of 30% or more and 100% or less on the wall surface of the heater insertion cavity.

Further, the heat-not-burn tobacco has a filter coaxially connected to the proximal end side of the tobacco rod, and the filter cools a volatile substance released from an aerosol-forming substrate contained in the tobacco filler. It may include a cooling unit for the purpose.

The filter is arranged at a connection end connected to the base end side of the tobacco rod, and when the heater is inserted into the heater insertion cavity, the tobacco filler is placed on the mouth end side of the filter. It may include a support portion that supports the tobacco filler in order to prevent it from being pushed toward it.

Further, the filter may include a mouthpiece portion arranged on the mouthpiece end side of the filter.

According to the present invention, in a heat-not-burn tobacco having a tobacco rod formed by filling the inside of a wrapping paper with a tobacco filler containing a tobacco raw material and an aerosol-forming substrate, for inserting a heater opened on the tip surface side of the tobacco rod. It is possible to provide a technique for suppressing the blockage of the cavity during the storage period.

FIG. 1 is a diagram schematically showing the internal structure of the heat-not-burn tobacco according to the first embodiment. FIG. 2 is a diagram showing details of a tobacco rod in heat-not-burn tobacco. FIG. 3 is a schematic configuration diagram of a heating device to which heat-not-burn tobacco is applied. FIG. 4 is a diagram showing a state in which an electric heater is inserted into the tobacco rod to a specified depth when the tobacco rod is attached to the accommodation cavity in the heating device. FIG. 5 is a diagram illustrating a tobacco rod according to the first modification. FIG. 6 is a diagram showing a state in which the tobacco rod according to the first modification is attached to the accommodation cavity in the heating device. FIG. 7 is a diagram illustrating a tobacco rod according to a second modification. FIG. 8 is a diagram showing a state in which the tobacco rod according to the second modification is attached to the accommodation cavity in the heating device. FIG. 9A is a diagram illustrating a heater insertion cavity portion according to a third modification. FIG. 9B is a diagram illustrating a heater insertion cavity portion according to the fourth modification. FIG. 9C is a diagram illustrating a heater insertion cavity portion according to the fifth modification.

Here, an embodiment of the heat-not-burn tobacco according to the present invention will be described with reference to the drawings. The dimensions, materials, shapes, relative arrangements, etc. of the components described in the present embodiment are not intended to limit the technical scope of the invention to those, unless otherwise specified. No.

<Embodiment 1>
[Heat-not-burn tobacco]
FIG. 1 is a diagram schematically showing an internal structure of the heat-not-burn tobacco 1 according to the first embodiment. The heat-not-burn tobacco 1 is a type of tobacco article that heats the tobacco filler without burning it and delivers the aerosol produced in the tobacco filler to the user.

The heat-not-burn tobacco 1 includes a tobacco rod 2 and a filter 3 arranged coaxially. The heat-not-burn tobacco 1 has a mouthpiece end 1a that the user inserts into the oral cavity during use, and a tip 1b at the end opposite to the mouthpiece end 1a. The filter 3 has a support portion 4, a cooling portion 5, and a mouthpiece portion 6 arranged coaxially, and these members are arranged in order from the tip end side of the filter 3. The support portion 4, the cooling portion 5, and the mouthpiece portion 6 of the filter 3 are integrally wound by the winding paper 7. Further, the tobacco rod 2 and the filter 3 are integrally connected by being wound up by the chip paper 8.

When the heat-not-burn tobacco 1 is used, air is sucked by the user from the tip 1b to the mouthpiece end 1a through the heat-not-burn tobacco 1. The tip 1b of the heat-not-burn tobacco 1 can be regarded as the tip or the upstream end of the tobacco rod 2, and the mouthpiece end 1a of the heat-not-burn tobacco 1 can be regarded as the rear end or the downstream end of the mouthpiece portion 6.

The tobacco rod 2 is arranged at the tip 1b of the heat-not-burn tobacco 1. The tobacco rod 2 is a rod-shaped member wrapped with rolling paper 22 so as to cover the side surface of the tobacco filler 21 containing the tobacco nicks and the aerosol-forming substrate. In the present embodiment, the tobacco raw material contained in the tobacco filler 21 may contain any one or more of chopped tobacco, tobacco granules, and reconstituted tobacco material. In the present embodiment, the tobacco filler 21 is a reconstituted tobacco material. The reconstituted tobacco material may be a reconstituted tobacco sheet cut into small pieces or crushed into a granular or powdery form, or the reconstructed tobacco sheet folded without being cut. There may be. The reconstituted tobacco sheet is, for example, a homogenized tobacco to which a binder, a gelling agent, a cross-linking agent, a fragrance, a viscosity modifier, or the like is added and kneaded, and molded into a sheet by an appropriate method. Homogenized tobacco is a tobacco material obtained by crushing, grinding and mixing leaf tobacco, dried tobacco leaves, chopped tobacco, swollen tobacco, regenerated tobacco and the like. The reconstructed tobacco sheet may be a reconstructed tobacco slurry sheet (reconstructed tobacco cast sheet), a reconstructed tobacco abstracted sheet, or a reconstructed tobacco rolled sheet formed by an appropriate method such as a slurry method, a drafting method, or a rolling method. There may be. For example, the reconstituted tobacco slurry sheet is a reconstituted tobacco sheet produced by drying and dehydrating the reconstructed tobacco slurry developed on a flat plate. The reconstituted tobacco papermaking sheet is a reconstituted tobacco sheet produced by blending pulp (cellulose fiber) with a reconstituted tobacco slurry and making paper. The reconstructed tobacco rolled sheet is a reconstructed tobacco sheet manufactured by rolling a reconstructed tobacco slurry into a sheet shape by a roller or the like and drying the sheet.

The aerosol-forming base material contained in the tobacco filler 21 is a substance that produces an aerosol when the volatile substance released by volatiles is cooled. The type of aerosol-forming substrate is not particularly limited, and various substances extracted from natural products can be appropriately selected depending on the intended use. Examples of the aerosol-forming substrate include glycerin, propylene glycol, triacetin, 1,3-butanediol, and a mixture thereof. Further, the tobacco filler 21 may contain a fragrance. The type of fragrance is not particularly limited.

The support portion 4 is a segment located on the front end side of the filter 3. The support portion 4 is located immediately downstream of the tobacco rod 2 and is arranged in contact with the rear end of the tobacco rod 2. The support portion 4 may be, for example, a hollow cellulose acetate tube. In other words, the support portion 4 may be formed by penetrating a center hole in the center of the cross section of the columnar cellulose acetate fiber bundle. Further, as another form, the support portion 4 may be a paper filter filled with cellulose fibers, a paper tube, or the like. A paper tube having a certain thickness can be effectively used as the support portion 4. In the support portion 4, when the electric heater of the heating device to which the heat-not-burn tobacco 1 is applied is inserted into the tobacco rod 2, the tobacco filler 21 is moved downstream toward the cooling portion 5 in the heat-not-burn tobacco 1. It is a segment to prevent being pushed in. The support portion 4 also functions as a spacer for separating the cooling portion 5 of the heat-not-burn tobacco 1 from the tobacco rod 2.

The cooling unit 5 is located immediately downstream of the support unit 4 and is arranged in contact with the rear end of the support unit 4. When the heat-not-burn tobacco 1 is used, the volatile substance released from the tobacco rod 2 (tobacco filler 21) flows downstream along the cooling unit 5. The volatile substance released from the tobacco rod 2 (tobacco filler 21) is cooled by the cooling unit 5 to form an aerosol inhaled by the user. In the form shown in FIG. 1, the cooling unit 5 is formed of a hollow paper tube having a ventilation hole 5a into which external air can be introduced. However, the cooling unit 5 does not have to have the ventilation hole 5a. Further, the cooling unit 5 may have an endothermic agent arranged so as not to obstruct the flow of the volatile substance and the aerosol. For example, the cooling portion 5 may be formed of a filter material in which a large number of flow paths (through holes) are formed along the longitudinal direction (axial direction) of the filter 3.

The mouthpiece portion 6 is a segment located at the rear end of the filter 3, that is, on the mouthpiece end 1a side. The mouthpiece portion 6 may be located immediately downstream of the cooling portion 5 and may be arranged in contact with the rear end of the cooling portion 5. In the form shown in FIG. 1, the mouthpiece portion 6 may include, for example, a filter material formed of cellulose acetate fibers formed into a columnar shape. Further, the mouthpiece portion 6 may be a center hole filter, a paper filter filled with cellulose fibers, or a paper tube containing no filter medium. The mouthpiece portion 6 may be formed of any of a solid filter material having a filter medium, a center hole filter, a paper filter, and a paper tube containing no filter medium, or may be formed by selectively combining a plurality of these. May be done.

FIG. 2 is a diagram showing details of the tobacco rod 2 in the heat-not-burn tobacco 1. As shown in FIG. 2, a heater insertion cavity 23 for inserting a heater of a heating device is opened in the tip surface 2a of the tobacco rod 2 (tobacco filler 21). In the example shown in FIG. 2, the heater insertion cavity 23 is formed as a non-penetrating recess (cavity) along the axial direction of the tobacco rod 2 (tobacco filler 21). However, the heater insertion cavity 23 may be formed as a cavity that penetrates along the axial direction of the tobacco rod 2 (tobacco filler 21). In the form shown in FIG. 2, the heater insertion cavity 23 has a tapered conical shape in which the diameter is reduced from the front end surface 2a of the tobacco rod 2 (tobacco filler 21) toward the rear end side, but the tip end. It may have a tapered truncated cone shape whose diameter is reduced from the surface 2a toward the rear end side. The shape of the heater insertion cavity 23 is not particularly limited, and may have a shape other than a conical shape or a truncated cone shape, for example, a cylindrical shape. Reference numeral CL1 shown in FIG. 2 is the central axis of the tobacco rod 2. The heater insertion cavity 23 may be formed coaxially with the central axis CL1 of the tobacco rod 2.

Here, the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) has a diameter of 1 mm or more and 4 mm or less at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and the tip surface. It is preferable that the diameter at the position of the second end 23b located on the opposite side of 2a is larger than 0 mm and 0.5 mm or less. The diameter of the heater insertion cavity 23 at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2 is 10% or more and 80% or less with respect to the diameter of the tobacco rod 2, and the second end 23b. It is preferable that the diameter at the position of is 0% or more and 10% or less with respect to the diameter of the tobacco rod 2.

Further, as shown in FIG. 2, a coating layer 24 is formed around (sideways) the heater insertion cavity 23 in the tobacco rod 2 (tobacco filler 21). The coating layer 24 is provided to prevent the heater insertion cavity 23 in the tobacco rod 2 (tobacco filler 21) from being blocked by binding the tobacco chops contained in the tobacco filler 21 to each other. It is a hardened layer. Here, since the tobacco filler 21 constituting the tobacco rod 2 is not a plastic body but an elastic body, when the heater insertion cavity 23 is formed in the tobacco rod 2, it is simply perforated from the tip surface 2a side of the tobacco rod 2. Immediately after the drilling process, the tobacco filler 21 begins to be elastically deformed in the direction of closing the heater insertion cavity 23 (the direction in which the cross section of the heater insertion cavity 23 decreases). When the heated tobacco 1 is stored for a long period of time, the heater insertion cavity 23 of the tobacco rod 2 may be blocked. Therefore, in the present embodiment, a coating layer 24 for suppressing the blockage of the heater insertion cavity 23 is formed around the heater insertion cavity 23 in the tobacco rod 2 (tobacco filler 21). ..

The coating layer 24 can be formed by adding a coating agent for suppressing deformation of the tobacco rod 2 in the direction in which the heater insertion cavity 23 is closed to the tobacco filler 21. Various materials can be used as the coating agent, and for example, calcium carbonate, sodium silicate, agar, gelatin, CMC, PVA, EVA, pectin, carrageenan, gellan gum, guar gum, arabic gum, xanthan gum, corn starch, alginic acid. Sodium, polyurethane, polyamide, hydroxyl-containing compounds, dextrin or dextrin derivatives, hydroxypropylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, methylcellulose, konjak, collagen, inulin, soybean protein, milky protein, casein, wheat gluten, carrageenin, alginate, Use of a single substance such as propylene glycol alginate, pullulan, curdlan, eel gum, tara gum, tragacanto gum, zein, obaco seed, chitin, chitosan, acacia gum, polyvinylpyrrolidone, polyethylene oxide, or a mixture thereof can be mentioned. ..

Here, the ease of handling the coating agent, the difficulty of the tobacco filler 21 adhering to the electric heater when the electric heater is inserted into the heater insertion cavity 23, the heat resistance, and the flavor and taste when the heater is heated. From the above viewpoints, it is preferable to use an aqueous solution containing calcium carbonate or an aqueous solution containing sodium silicate (water glass) as the coating agent.

The amount of the coating agent added per tobacco rod is not particularly limited, and examples thereof include an embodiment in which the amount is in the range of 5 mg or more and 60 mg or less. That is, the coating layer 24 in the tobacco rod 2 may contain a coating agent of 5 mg or more and 60 mg or less. Specifically, the amount of the coating agent added can be determined according to the diameter and length of the tobacco filler 21 contained in the tobacco rod 2, the filling density and physical properties of the tobacco engraving to be filled, and the like. Further, the coating layer 24 in the tobacco rod 2 may cover a range of 30% or more and 100% or less of the wall surface (surface) of the heater insertion cavity 23. Further, the coating layer 24 in the tobacco rod 2 preferably covers a range of 50% or more and 100% or less of the wall surface of the heater insertion cavity 23, and 60% or more and 100% or less of the wall surface of the heater insertion cavity 23. It is more preferable to cover the range of. However, by setting the ratio of the coating layer 24 covering the wall surface of the heater insertion cavity 23 to 30% or more and 100% or less, the effect of the coating layer 24 described later can be sufficiently obtained.

FIG. 3 is a schematic configuration diagram of a heating device 100 to which the heat-not-burn tobacco 1 according to the first embodiment is applied. The heating device 100 has a housing 102 which is a housing for accommodating various components. An electric heater 103, a controller (control unit) 104, a power supply 105, and the like are housed in the housing 102. The housing 102 has a containment cavity 107 including an opening 106 into which the tobacco rod 2 of the heat-not-burn tobacco 1 is inserted. The accommodating cavity 107 is a hollow portion having a cylindrical shape and can accommodate the tobacco rod 2.

As shown in FIG. 3, an electric heater 103 is provided in the accommodation cavity 107. The electric heater 103 has a conical shape and projects vertically from the central portion of the bottom portion 107a of the accommodation cavity 107 toward the opening 106 side, and gradually projects from the base end portion 103a toward the tip end portion 103b. It is tapered to. Further, the central axis of the electric heater 103 is coaxial with the central axis of the accommodating cavity 107. The type of the electric heater 103 is not particularly limited, but for example, a steel material having a heating wire (for example, nichrome, iron chromium, iron nickel, etc.) arranged around it, a ceramic heater, or the like can be used.

In the heat-not-burn tobacco 1 configured as described above, since the heater insertion cavity 23 is formed in the tobacco rod 2 (tobacco filler 21), the tobacco rod 2 is attached to the accommodation cavity 107 of the heating device 100. At this time, by inserting the electric heater 103 into the heater insertion cavity portion 23 of the tobacco rod 2 (tobacco filler 21), the insertion resistance when the electric heater 103 is inserted into the tobacco filler 21 can be reduced. This makes it possible to improve usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103 is inserted into the tobacco rod 2). Further, when the electric heater 103 is inserted into the tobacco rod 2, it is possible to prevent the electric heater 103 from being damaged such as bent or bent, and to prevent the tobacco rod 2 from buckling and deforming. Further, when the tobacco rod 2 is attached to the accommodating cavity 107 of the heating device 100, it is possible to prevent the tobacco filler 21 of the tobacco rod 2 from being pushed toward the mouthpiece side.

Further, in the present embodiment, since the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) has a conical shape, when the electric heater 103 is inserted into the heater insertion cavity 23, the heater insertion cavity 23 has a conical shape. The tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23 and the electric heater 103 can be suitably brought into close contact with each other, and the heat conduction from the electric heater 103 to the tobacco filler 21 can be improved. Further, when the tobacco rod 2 of the heat-not-burn tobacco 1 is pulled out from the accommodation cavity 107 of the heating device 100 after use, the frictional force generated between the electric heater 103 and the tobacco filler 21 is small, so that the tobacco filler 21 falls off. It's hard to happen. Further, since the seizure of the tobacco filler 21 during use is less likely to occur, it is possible to prevent the tobacco filler 21 from falling off when the tobacco rod 2 is pulled out from the accommodation cavity 107 of the heating device 100 after use.

Here, in the heater insertion cavity portion 23 of the tobacco rod 2 (tobacco filler 21) in the present embodiment, the cross-sectional area orthogonal to the central axis CL1 direction of the tobacco rod 2 is inserted into the tobacco rod 2 to a specified depth. It may be smaller than the cross-sectional area of each facing portion of the electric heater 103 in the state. FIG. 4 is a diagram showing a state in which the electric heater 103 is inserted into the tobacco rod 2 to a specified depth when the tobacco rod 2 is attached to the accommodation cavity 107 in the heating device 100. In the present embodiment, the diameter (cross-sectional area) of the heater insertion cavity 23 is 70% or more and 99% of the diameter (cross-sectional area) of each facing portion of the electric heater 103 when inserted into the tobacco rod 2 to a specified depth. It is set in the following range. The respective facing portions referred to here are portions facing each other in the electric heater 103 and the heater insertion cavity portion 23 in a state where the electric heater 103 is inserted into the tobacco rod 2 to a specified depth.

When the cross-sectional area of the heater insertion cavity 23 of the tobacco rod 2 (tobacco filler 21) in the present embodiment is smaller than that of each corresponding portion of the electric heater 103 of the heating device 100 to which the heat-not-burn tobacco 1 is applied. When the electric heater 103 is inserted into the heater insertion cavity 23, the electric heater 103 is inserted while expanding the heater insertion cavity 23. In this case, the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23 and the electric heater 103 can be further brought into close contact with each other, and the heat conduction efficiency from the electric heater 103 to the tobacco filler 21 can be improved. Can be done.

According to the heat-not-burn tobacco 1 in the present embodiment, since the coating layer 24 is formed around the heater insertion cavity 23 in the tobacco rod 2 (tobacco filler 21), the heater insertion cavity 23 It is possible to form a support that connects the tobacco nicks contained in the tobacco filler 21 existing in the surroundings. As a result, in the manufacturing process of the heat-not-burn tobacco 1, a drilling process is performed to form the heater insertion cavity 23 by inserting the drilling needle into the tobacco rod 2 from the tip surface 2a side, and then the heater insertion cavity is formed. It is possible to suppress elastic deformation of the tobacco filler 21 in the direction of closing the 23 (the direction in which the cross section of the heater insertion cavity 23 decreases). Therefore, even if the heat-not-burn tobacco 1 is stored for a long period of time, it is possible to prevent the heater insertion cavity 23 of the tobacco rod 2 from being blocked over time.

<First modification>
FIG. 5 is a diagram illustrating a tobacco rod 2 (tobacco filler 21) according to the first modification. The heater insertion cavity 23A of the tobacco rod 2 in the first modification has a cylindrical shape having a constant diameter along the central axis CL1 direction of the tobacco rod 2. FIG. 6 is a diagram showing a state in which the tobacco rod 2 according to the first modification is attached to the accommodation cavity 107 in the heating device 100. FIG. 6 shows a state in which the electric heater 103A is inserted into the tobacco rod 2 to a specified depth. Further, in the present modification, the electric heater 103A has a cylindrical shape like the heater insertion cavity portion 23A according to the first modification.

Also in the heater insertion cavity portion 23A according to the first modification, the diameter (cross-sectional area) may be set to a value relatively smaller than that of the electric heater 103A. In this case, when the electric heater 103A is inserted into the heater insertion cavity 23A, the electric heater 103A is inserted while expanding the heater insertion cavity 23A. As a result, the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23A and the electric heater 103A can be brought into close contact with each other. As a result, the heat conduction efficiency from the electric heater 103A to the tobacco filler 21 can be improved.

Here, if the diameter of the heater insertion cavity 23A is excessively small, the insertion resistance when inserting the electric heater 103A tends to increase, and if the diameter of the heater insertion cavity 23A is excessively large, the electric heater 103A is inserted. The contact property is likely to deteriorate. Therefore, in the heater insertion cavity 23A of the first modification, the diameter (cross-sectional area) is set in the range of 70% or more and 99% or less of the diameter (cross-sectional area) of the electric heater 103A. As a result, it is possible to achieve both the insertion resistance when inserting the electric heater 103A and the contactability after insertion. As a result, both the usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103A is inserted into the tobacco rod 2) and the heating efficiency when the tobacco filler 21 is heated by the electric heater 103A are improved. Can be done.

Further, since the heater insertion cavity 23A according to the first modification has a cylindrical shape having a constant diameter, the tobacco filler 21 around the heater insertion cavity 23A is also provided on the second end 23b side. It can be sufficiently heated when the heater is heated. Therefore, it is possible to prevent the temperature distribution from occurring in the tobacco filler 21 along the direction of the central axis CL1 when the heater is heated, and it is possible to suppress a decrease in the delivery amount of the aerosol.

The heater insertion cavity 23A in the first modification preferably has a cylindrical shape having a diameter of 1 mm or more and 4 mm or less. Further, it is preferable that the diameter of the heater insertion cavity 23A is 10% or more and 80% or less with respect to the diameter of the tobacco rod 2. For example, when the diameter of the tobacco rod 2 is 7 mm, it is preferable that the diameter of the heater insertion cavity 23A is about 2.5 mm.

<Second modification>
FIG. 7 is a diagram illustrating a tobacco rod 2 (tobacco filler 21) according to a second modification. The heater insertion cavity 23B of the tobacco rod 2 in the second modification has a truncated cone shape (cut cone shape) tapered along the central axis CL1 direction of the tobacco rod 2. FIG. 8 is a diagram showing a state in which the tobacco rod 2 according to the second modification is attached to the accommodation cavity 107 in the heating device 100. FIG. 8 shows a state in which the electric heater 103B is inserted into the tobacco rod 2 to a specified depth. Further, in the present modification, the electric heater 103B has a truncated cone shape (cut cone shape) like the heater insertion cavity portion 23B according to the second modification.

The diameter (cross-sectional area) of the heater insertion cavity 23B according to the second modification is smaller than the diameter (cross-sectional area) of each facing portion of the electric heater 103B when the electric heater 103B is inserted to the specified depth in the tobacco rod 2. It may be set to a value. In this case, when the electric heater 103B is inserted into the heater insertion cavity 23B, the electric heater 103B is inserted while expanding the heater insertion cavity 23B. As a result, the tobacco filler 21 surrounding the lateral periphery of the heater insertion cavity 23B and the electric heater 103B can be brought into close contact with each other. As a result, the heat conduction efficiency from the electric heater 103B to the tobacco filler 21 can be improved.

Here, if the diameter of the heater insertion cavity 23B is excessively small, the insertion resistance when inserting the electric heater 103B tends to increase, and if the diameter of the heater insertion cavity 23B is excessively large, the electric heater 103B is inserted. The contact property is likely to deteriorate. Therefore, the diameter (cross-sectional area) of the heater insertion cavity 23B of the second modification is 70% or more of the diameter (cross-sectional area) of each facing portion of the electric heater 103B in the state of being inserted into the tobacco rod 2 to a specified depth. It was decided to set it in the range of 99% or less. As a result, it is possible to achieve both the insertion resistance when the electric heater 103B is inserted into the tobacco rod 2 and the contact property after the insertion. As a result, both the usability when the tobacco rod 2 is attached to the heating device 100 (when the electric heater 103B is inserted into the tobacco rod 2) and the heating efficiency when the tobacco filler 21 is heated by the electric heater 103B are improved. Can be done.

Further, according to the heater insertion cavity 23B in the second modification, since the truncated cone shape (truncated cone shape) is adopted, the heater insertion cavity 23 adopting the conical shape and the heater adopting the cylindrical shape. The advantages of the insertion cavity 23 can be compatible with each other.

That is, the heater insertion cavity 23B according to the second modification has a larger diameter at the position of the second end 23b located on the mouthpiece side than the heater insertion cavity 23 that adopts the conical shape. Therefore, it is possible to make it difficult for the temperature distribution along the central axis CL1 direction in the tobacco filler 21 to occur when the heater is heated. Further, according to the heater insertion cavity portion 23B according to the second modification, since the tobacco rod 2 has a tapered diameter (cross-sectional area) along the central axis CL1 direction, the tobacco rod 2 has an electric heater 103B. It is possible to improve the contactability after insertion while reducing the insertion resistance at the time of inserting.

Here, the heater insertion cavity portion 23B according to the second modification has a diameter of 1 mm or more and 4 mm or less at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2, and is on the opposite side to the tip surface 2a. It is preferable that the diameter at the position of the second end 23b located in is 0.5 mm or more and 3.5 mm or less. The diameter of the heater insertion cavity 23B at the position of the first end 23a located on the tip surface 2a side of the tobacco rod 2 is 10% or more and 80% or less with respect to the diameter of the tobacco rod 2, and the second end 23b. It is preferable that the diameter at the position of is 5% or more and 70% or less with respect to the diameter of the tobacco rod 2.

The heater insertion cavities 23, 23A, and 23B of the tobacco rod 2 (tobacco filler 21) in the present embodiment are not limited to the above-mentioned conical shape, cylindrical shape, and conical trapezoidal shape, and various shapes may be adopted. Can be done. Further, the number of heater insertion cavities 23, 23A, 23B formed in the tobacco rod 2 (tobacco filler 21) is not particularly limited. For example, the tobacco rod 2 (tobacco filler 21) may be formed with a plurality of heater insertion cavities 23, 23A, 23B.

Further, the case where the heater insertion cavities 23, 23A, and 23B up to the above are formed as non-penetrating recesses that do not penetrate the tobacco rod 2 along the central axis CL1 direction of the tobacco rod 2 has been described as an example. It may be formed as a through hole penetrating the rod 2. FIG. 9A is a diagram illustrating a heater insertion cavity portion 23C according to a third modification. The heater insertion cavity 23C according to the third modification has a conical shape, and is different from the heater insertion cavity 23 shown in FIG. 2 except that it is formed as a through hole penetrating the tobacco rod 2. It is the same. FIG. 9B is a diagram illustrating the heater insertion cavity portion 23D according to the fourth modification. The heater insertion cavity 23D according to the fourth modification has a cylindrical shape, and is different from the heater insertion cavity 23A shown in FIG. 5 except that it is formed as a through hole penetrating the tobacco rod 2. It is the same. FIG. 9C is a diagram illustrating the heater insertion cavity portion 23E according to the fifth modification. The heater insertion cavity 23E according to the fifth modification has a truncated cone shape and is formed as a through hole penetrating the tobacco rod 2. The heater insertion cavity 23B shown in FIG. 7 is shown. Is the same as.

As shown in FIGS. 9A to 9C, when the heater insertion cavities 23C, 23D, 23E are through holes penetrating along the central axis CL1 direction of the tobacco rod 2, the heater insertion cavities 23C, 23D, The tobacco rod 2 after forming the 23E may be integrally connected to the filter 3 by a filter tip attachment device. As a result, for example, when the heater insertion cavities 23C, 23D, and 23E are formed by inserting the needle into the tip surface 2a of the tobacco rod 2, even if the tobacco filler 21 is pushed out to the mouthpiece side by the needle. After that, if the tobacco rod 2 is connected to the filter 3, no particular inconvenience will occur.

Further, as shown in FIGS. 9A to 9C, the heater insertion cavities 23C, 23D, and 23E are formed as through holes penetrating the tobacco rod 2, so that the tobacco filler 21 is downstream from the tip of the electric heater 103. Does not reduce the thermal conductivity when the heater is heated. As a result, it is possible to prevent the aerosol generated during heating of the heater from being cooled and condensed in the tobacco filler 21 placed in the vicinity of the tip of the electric heater 103. As a result, the amount of aerosol delivered during use can be increased.

On the other hand, as shown in FIGS. 2, 5, and 7, by forming the heater insertion cavities 23, 23A, and 23B as non-penetrating holes that do not penetrate the tobacco rod 2, for example, the tip surface of the tobacco rod 2 is formed. When the heater insertion cavities 23, 23A, and 23B are formed by inserting the needle into 2a, the needle does not push the tobacco filler 21 of the tobacco rod 2 toward the mouthpiece side. As a result, in the filter tip attachment device, after the filter 3 is connected to the tobacco rod 2, the heater insertion cavities 23, 23A and 23B can be drilled, and the manufacturing suitability is excellent.

Although the embodiments according to the present invention have been described above, the heat-not-burn tobacco according to the present invention is not limited to these.

1 ... Heat-not-burn tobacco 2 ... Tobacco rod 3 ... Filter 4 ... Support part 5 ... Cooling part 6 ... Mouthpiece part 21 ... Tobacco filling material 23 ... Heater insertion Cavity 24 ... Coating layer

Claims (7)

A heat-not-burn tobacco having a tobacco rod formed by filling the inside of a wrapping paper with a tobacco filler containing a tobacco raw material and an aerosol-forming substrate.
A heater insertion cavity for inserting a heater of a heating device, which opens toward the tip end surface side of the tobacco rod and extends along the axial direction of the tobacco rod.
A coating layer formed around the side of the heater insertion cavity in the tobacco rod and for suppressing the blockage of the heater insertion cavity,
To prepare
Heat-not-burn tobacco. The heat-not-burn tobacco according to claim 1, wherein the coating layer contains calcium carbonate or sodium silicate. The heat-not-burn tobacco according to claim 1 or 2, wherein the coating layer contains 5 mg or more and 60 mg or less of a coating agent. The heat-not-burn tobacco according to any one of claims 1 to 3, wherein the coating layer is formed so as to cover a range of 30% or more and 100% or less on the wall surface of the heater insertion cavity. The heat-not-burn tobacco has a filter coaxially connected to the proximal end side of the tobacco rod.
The filter includes a cooling unit for cooling the volatile substances released from the aerosol-forming substrate contained in the tobacco filler.
The heat-not-burn tobacco according to any one of claims 1 to 4. The filter is arranged at a connection end connected to the base end side of the tobacco rod, and when the heater is inserted into the heater insertion cavity, the tobacco filler is placed on the mouth end side of the filter. Includes a support that supports the tobacco filler to prevent it from being pushed towards,
The heat-not-burn tobacco according to claim 5. The heat-not-burn tobacco according to claim 6, wherein the filter includes a mouthpiece portion arranged on the mouthpiece end side of the filter.

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